Model Of Geometric Proportions Small 320×189 Medium 640×378 Large 1024×605 Download Tiff Original 2400×1419 | (168.1 KB) Description An illustration showing a model that illustrates the following relationships: a:x = x:a - x, x = √(a² + (a/2)² - a/2). Keywords arc, arcs, circle, geometric relationships, model of geometric proportions, polygon relationships, proof, proportion, quadrilateral, theorem Galleries Geometric Theorems and Proofs Source: Albert A. Hopkins Scientific America: Handy Book Of Facts And Formulas (New York: Munn & Co., Inc., 1918) 41
